Know all about Gabbro and Itacolumite properties here. All properties of rocks are important as they define the type of rock and its application. Gabbro belongs to Igneous Rocks while Itacolumite belongs to Sedimentary Rocks.Texture of Gabbro is Phaneritic whereas that of Itacolumite is Clastic, Granular, Rough. Gabbro appears Veined and Shiny and Itacolumite appears Rough. The luster of Gabbro is not available while that of Itacolumite is dull. Gabbro is available in dark grey to black colors whereas Itacolumite is available in beige, black, brown, colourless, cream, dark brown, green, grey, light green, light to dark grey, pink, red, white, yellow colors. The commercial uses of Gabbro are cemetery markers, commemorative tablets, laboratory bench tops, jewelry, sea defence, tombstones and that of Itacolumite are an oil and gas reservoir, in aquifers, petroleum reservoirs, soil conditioner, source of magnesia (mgo), tombstones.